Flight Testing of Alternative Ventilation Systems for Aircraft Cabins

Bosbach, Johannes; Heider, André; Dehne, Tobias; Markwart, Michael; Gores, Ingo; Bendfeldt, Peggy

doi:10.1007/978-3-319-03158-3_28

Cited by 6 publications

(4 citation statements)

References 3 publications

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“…The latter system provided much better air quality than mixing ventilation and was easy to install. Bosbach et al 124 were the first to test a displacement ventilation system with air supply from the side walls under flight conditions in an A‐320 passenger aircraft cabin. They found that the system provided low air velocity and turbulence.…”

Section: Efforts To Improve the Cabin Air Environmentmentioning

confidence: 99%

Recent progress on studies of airborne infectious disease transmission, air quality, and thermal comfort in the airliner cabin air environment

et al. 2022

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According to the International Air Transport Association, 1 air transportation was a very popular mode of travel in 2019, as 4.5 billion people flew to various destinations around the world. However, the COVID-19 pandemic placed air travel on hold in 2020, when only 1.8 billion passengers flew, a decrease of 60.2% from the previous year.The worst month was April 2020, when airlines experienced a 94% reduction in passenger capacity worldwide. 2 A study by Boeing 3 showed that the global risk of COVID-19 transmission during air travel was 1 in 1.7 million. However, other studies have reported an attack rate of 9.7% to 62%. 4,5 The flying public has reasonable doubts about the ability of modern airliners to protect them from infection by airborne diseases such as COVID-19. Airborne infectious diseases are not the only source of concern for the flying public. Cabin air quality has become a very popular topic for research. The National Research Council in the United States 6 conducted a comprehensive review of the airliner cabin air

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Section: Efforts To Improve the Cabin Air Environmentmentioning

confidence: 99%

Recent progress on studies of airborne infectious disease transmission, air quality, and thermal comfort in the airliner cabin air environment

et al. 2022

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“…Here, it is crucial to simulate realistic boundary conditions, both geometrically as well as thermodynamically, to cover all relevant flight scenarios and operational phases. Therefore, flight tests are considered to be the most appropriate experimental scenario to verify and validate novel concepts under realistic stationary as well as non-stationary boundary conditions [11,12]. Especially the work of [13] prove, that different thermodynamic boundary conditions occur (e.g., temperatures of the cabin's inner surfaces) dependent on the flight and operational phase.…”

Section: Hdogmentioning

confidence: 99%

Realistic flight conditions on ground: new research facility for cabin ventilation

et al. 2022

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A new full-scale test bench was developed and set up at the German Aerospace Center in Göttingen to experimentally analyze novel ventilation approaches for aircraft under realistic thermodynamic boundary conditions. The new ground-based test rig represents a modern twin-aisle cabin layout characteristic for long-haul airliners. In addition to having a realistic cabin geometry, it also facilitates the experimental simulation of thermodynamic boundary conditions to study the performance of alternative ventilation concepts for different flight phases (e.g., climbing or cruising). The implemented fuselage elements as well as the floor are temperature controllable. Using this kind of mantle heating/cooling system allows dynamic changes of inner surface temperatures in a range covering the operationally relevant temperature and time scales. With this experimental set-up, a complete flight scenario (i.e., taxiing, climbing, cruising and descent) can be simulated thermodynamically. Thermal manikins were used during the studies to simulate the passenger’s heat impact experimentally. Latest measurement techniques comprising the acquisition of flow velocities, fluid temperatures as well as surface temperatures were used. Based on these data, integral quantities like the mean temperature stratification and mean velocity levels near the manikins, the heat removal efficiency as well as the predicted mean vote and the percentage of dissatisfied passengers were calculated to score the ventilation concepts in terms of passenger comfort for two different operational scenarios under steady boundary conditions.

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“…Zhao et al [2] found that compared with other areas in the cabin, the human body's exhaled carbon dioxide concentration was relatively high in the airflow self-locking area in their study. Bosbach et al [3,4] of the German Aerospace Center took the A320 cabin as the research object, experimentally studied the flow heat transfer problem in the cabin under mixing ventilation and displacement ventilation, and conducted experimental research on the displacement ventilation in the cabin of a real passenger airliner. The results show that the low airspeed provided by displacement ventilation can better control the air temperature.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Air Distribution and Evolution Characteristics in Airliner Cabin

Xiao

Zhang

et al. 2022

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The distribution and evolution of air in airliner cabins is an important basis for the study of cabin thermal environment and pollutant propagation. Due to the complex heat and mass transfer problems caused by forced and natural convection in a large-scale space, the accurate prediction of air distribution in airliner cabins still faces huge challenges. This study takes the cabin of the Airbus A320 as the research object. The accurate numerical simulation of the flow and heat transfer process in an airliner cabin under mixing ventilation mode was carried out using the Hybrid Thermal Lattice Boltzmann Method (HTLBM) combined with GPU (Graphics Processing Unit) acceleration technology, and the influence of human thermal plumes on air distribution and evolution characteristics in an airliner cabin was analyzed. The research shows that the human thermal plume changes the air distribution in the passenger cabin. The thermal plume slows down the jet attenuation, increases the energy exchange in the area near the passengers, and offsets the jet trajectory. The airflow self-locking effect is easier to form in the passenger breathing area, which increases the time for the flow field to develop into the steady state. The influence of human thermal plumes on the airflow distribution in the passenger cabin cannot be ignored.

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Flight Testing of Alternative Ventilation Systems for Aircraft Cabins

Cited by 6 publications

References 3 publications

Recent progress on studies of airborne infectious disease transmission, air quality, and thermal comfort in the airliner cabin air environment

Recent progress on studies of airborne infectious disease transmission, air quality, and thermal comfort in the airliner cabin air environment

Realistic flight conditions on ground: new research facility for cabin ventilation

Numerical Study of Air Distribution and Evolution Characteristics in Airliner Cabin

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